Valve



P. DUNCAN Sept. 6, 1932.

VALVE Filed April 27. 1931 Tram/EY.

' Patented Sept. .6, 1932.

VALVE Application led AApril 27,

This invention relates to valves and more particularly to a combinationhand and check valve7 the principal objects of the invention being'toprovide a removable and replaceable seat for a valve check, to providemeans carried by the valve for aiding in removal of the-seat, and toprovide foradjusting closure of the check to control back How throughthe valve.

It is also an object of the invention to provide a valve in which lowmay be controlled in either direction. y

In accomplishing these and other objects of the invention, I haveprovidedv improved details of structure, the preferred form of which isillustrated in the accompanying drawing, wherein:

Fig. 1 is a vertical longitudinal sectional view through a valveconstructed in accordance with my invention. v

Fig. 2 is a detail perspective view of the valve parts shown in relatedspaced position.

Fig. 3 is a horizontal section throu h the V `valve guide member on theline 3 3, 4ig. 2.

Referring more in detail to the drawing:

1 designates a valve body having oppositely positioned internallythreaded necks 2 and 3 by which the valve body may be connected betweenpipe sections of a ilow line, not

shown. Extending across the interior of the valve body is a partitionconsisting of spaced vertical webs 4 and 5 connected by a horizontal web6 having a vertically tapered opening 7 positioned concentrically of thevalve body. The partition thus separates the interior of the valve bodyinto individual fluid-receiving chambers y8 and 9 communicating 10through ports 10 and 1] with the threaded necks 2 and 3. l

Formed on the upper part of the body concentrically with the taperedopening 7 is an externally threaded-neck 12 for supporting a valvebonnet 13. The bonnet 13 comprises a stemor guide portion 14 and anenlarged cylindrical base portion .15 of suitable diameter to bevreceived within .the neck 12 5 and having an annular flange 16 forseat- Ving against the upper' face of the neck 12.

`nal bore 20 vlower end thereo 193i. serial u. 533,015.

The lflange 16 also provides an annular shoulder 17 engagedy by aninwardlyextending flange 18 on a retaining ring 19 that is threaded onthe neck 12 to retain the bonnet as in standard valve construction. B5

The stem guide is provided with an interhavino' threadsv 21 formed atthe and a packing-receiving groove 22 in the upper end to receive aypacky ing 23 that is compressed against the valve 60 stem by the usualpacking nut 24 and follower 25. y

26 designates a removable. valve seat and guide that is received in thetaperedopening formed in the horizontal portion 6 of 55 the partitionand extends upwardlyinto the upper chamber 8 to retain and seatva ballvalve 27 closing communication between the chambers 8 and 9. i

The valve guide preferably comprises a 7 cylindrical sleeve-likel memberhaving a taperedlower end 28 conformingto the'ta'per of the opening 7and an annularly extending collar 29 on its upper end for snugly engaging the inner wall of the neck`l2 whereby w the guide is centered inthe opening and` against which the bonnet'engages to'fretain the guidein its tapered seat.

Formed in the periphery of the guide member intermediate the collar 29and the ta- 30 pered portion-28 lis a plurality of ports 30 throughwhich fluid may flow from the chamber 8 intothe interior ofthe valveguide for passage through a valve seat 31,A thatjs formed with-the lowerend of the guide at a point below theports 30. -The lower end of theguide is provided with a preferably integral spider having a centralopening 32vfor receiving a pilot 33 on an adjustingvlscrew v 34, laterdescribed. It is thus apparent that 9 the ball valve 27 acts on thevalve seat and operates in the guide-to control communication betweenthe chambers 8 and 9.

In order lto retain the ball in sealing engagement on its seat and toshut 'oil' flow .95 through'the valve andto control the'distance thatthe ball may rise lfrom its seat, 'I

the customary valve stem 35 which extends through the stem guide landisprovidedwith 1ma threaded portion 36 `for engaging the prvide t.

threads formed in the bonnet previously described. The depending lowerend of the stem depends into the valve guide and is provided with anannular flange 37 for swivelly mounting ahead member 38.

The member 38 is provided with a recess 39 to receive the flange 37 andis retained thereon by a ring 40 sleeved on the stem and threaded intothe recess to engage the upper face of the ange. The lower face of themember 38 is provided with a concave surface 41 conforming to thecontour of the ball 27 for centering the ballon its seat.

The swivel mounting of the head is an important feature in that it isnot necessary for the head to move over the polished surface of the ball27 when the ball is moved to J closed position.

The upper end of the valve stem extends outwardly .through the packingnut 24 and is provided with the usual hand Wheel or the like 42.

In order that the valve guide and seat may A'be readily forced fromseating engagement with the tapered opening, I provide the ad justingscrew 34, previously mentioned. The screw 34 is threadedly mounted in aboss 43 formed in the bottom of the valve body in axial alignment withthe opening 32 and is provided with a lock nut 44 for engaging the underside of the boss to retain the adjusting screw in set position.

It is apparent that when the screw ,43 is rotated in the valve body, thepilot 33 will engage and raise the ball 27 from its seat and the fluidmay then iow through the valve from the chamber 8 through the valveguide into the chamber 9, the amount of flow, of course, depending uponthe amount of opening of the ball valve which is controlled by theposition of the head 38.

s When the adjusting screw is threaded into the valve body so that ashoulder 45 formed by the reduced pilot 33 engages the lower end of thevalve guide, the valve guide will be forced 4from its seat in order thatit may be re e aired or replaced.

hen the parts of the valve, constructed as described, are to beassembled the valve guide-is inserted through the neck 12 and itstapered end-28 is pressed into sealing engagement with`the tapered wallof the opening 7. The valve stem carrying the head 38 is then threadedinto the valve bonnet and the handwheel 42 applied to its upper end.

The bonnet 13 is then applied to the valve body and the threaded ring 19is applied to the neck 12 so that the lower end 15 of the bonnet isretained thereby in engagement with the upper end of the valve guide tokeep the valve guide in its seat.

The packing nut 24 is then tightened, compressing the packing 23 aboutthe valve stem to prevent leakage through the bonnet. The

adjusting screw 34 may then be inserted in may be controlled bymanipulating the valve stem 36 to position thehead in relation to theball. The valve is then in condition to be used as an ordinary handvalve wherein fluid may How either from the chamber 8 into the chamber 9or fromthe chamber 9 into the chamber 8. Should it be desired to use thevalve as a cheek valve, the lock nut on the adjusting screw will beloosened and the ad- 'usting screw will be rotated reversely to allowthe ball 27 to engage its seat. The fiow from the chamber 8 will then bechecked by the ball from flowing into the chamber 9, but fluid in thechamber 9 may raise the ball to low into the chamber 8, the flow beingdependent upon the amount of litt of the ball which is governed by theposition of the head 38.

When the valve seat becomes worn and it is desired to replace the valveguide, the bonnet is removed and the adjusting screw 34 is threaded intothe body until the shoulder 45 engages against the spider carried by thelower end of the valve guide, whereupon continued rotation ot the screwwill torce, the valve guide. from its seat. lt may then be readilyremoved from the upper end of the neck l2. After this operation theadjusting screw is reversely threaded from the valve body to permit anew valve seat` to be inserted in the threaded opening of the partition,after whichlthe adjusting screw may be positioned to permit properopening of the ball 27.v and the. bonnet carrying the valve stem andhead 38 is again applied to-the valve body.

What I claim and desire to secure by Letters Patent is:

1. In a valve of the character described including a valve body, apartition in the body having a tapered opening. a valve seat memberhaving a tapered periphery for sealing engagement with the taperedopening, and a screw member threaded into the valve body and adapted toengage said seat member for removing the seat member from the valvebody.

2. In a valve of the character described including a valve body, apartition in the body having a tapered opening, a valve seat vd, n

havin sealin engagement in the opening, a chec memger on the valve seat,a screw member threaded into the valve body and adapted to engage saidseat member for removing the seat member from the valve body, and apilot member on the screw for raising the check member from thefseatmember.

4. In a valve of the ,character described including a valve body', apartition in the body having a tapered o ening, a valve seat memberhaving a taperedp periphery for sealing engagement with the taperedopening, a guide member on the sea-t member, a ball valve operable inthe guide member and having engagement with the seat member, and a screwmember threaded into the valve body and adapted to engage said seatmember for removing the seat member from the'valve 5. In a valve of thecharacter described including a valve body, a partition in the bodyhaving a tapered o ning, a valve seat member having a tapere peripheryfor sealing engagement with the tapered opening, a valve bonnet for thebody member engaging the seat member to retain .the seat member in thetapered opening, and a screw member threaded into the valve body andadapted to engage said seat member for removing the seat member from thevalve body.

6. In a valve of the character described including a valve body, apartition in the body having a tapered opening, a valve seat memberhaving a tapered periphery for sealing engagement with the taperedopening, a spider on the seat member and a screw member threaded intothe valve body and adapted to engage said spider to remove the seatmember from the valve body.

In testimony whereof I ailix my signature.

PATRICK DUNCAN.

